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The 8 Planets --- Why each Planet is Unique!!

4,947 views · Published 13 May 2018 · 4:28 · Indexed 29 October 2026

Channel: MooMooMath and Science · 2018 · Education

How many solar system planets? A planet is an astronomical body orbiting a star.
The International Astronomical Union (IAU) defined in August 2006 that, in the Solar System, a planet is a celestial body which:

Is in orbit around the Sun,
has sufficient mass to assume hydrostatic equilibrium (a nearly round shape), and
has "cleared the neighborhood" around its orbit.
Cleared the neighborhood” means that the “planet” is the dominant gravitational body in their orbit around the sun. and has consumed or pushed away smaller objects in its orbital path.
According to this definition, there are 8 planets
Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune

Mercury is the smallest and innermost planet in the Solar System. Its orbital period around the Sun of 87.97 days is the shortest of all the planets in the Solar System.

Venus is the second planet from the Sun and very hot.

Earth is the third planet from the Sun and the only object in the Universe known to harbor life.

Mars is the fourth planet from the Sun.

Next are the ice giants

Jupiter is the fifth planet from the Sun
Saturn is the 6th planet from the sun.
Next , you have Uranus and then Neptune

Transcript
http://www.moomoomathblog.com/2023/01/the-planets-in-order-from-sun-plus.html

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